package com.itheima.service;

import com.itheima.domain.Teacher;

import java.util.ArrayList;

public interface ITeacherService {

    //增
    void addTeacher(Teacher teacher);
    //删
    void deleteTeacher(String sid);
    //改
    void updateTeacher(String sid,Teacher newTea);
    //查
    ArrayList<Teacher> findAllTeachers();
    //判断
    boolean isExists(String sid);

}
